import { AsyncIterableX } from '../../asynciterable/asynciterablex';
/**
 * @ignore
 */
export declare function countProto<T>(this: AsyncIterableX<T>, selector?: (value: T) => boolean | Promise<boolean>): Promise<number>;
declare module '../../asynciterable/asynciterablex' {
    interface AsyncIterableX<T> {
        count: typeof countProto;
    }
}